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CN-224232477-U - Secondary porcelain bushing structure of voltage transformer

CN224232477UCN 224232477 UCN224232477 UCN 224232477UCN-224232477-U

Abstract

The utility model relates to the technical field of voltage transformers, in particular to a secondary porcelain bushing structure of a voltage transformer, which comprises a wiring terminal, a first sealing washer, a porcelain bushing, a first locking nut, a mounting base and a sealing bushing, wherein the mounting base is fixedly connected to the outer wall of a shell of the voltage transformer, the wiring terminal penetrates into the mounting base to enable the upper end of the wiring terminal to penetrate out of the mounting base, the sealing bushing is sleeved on the wiring terminal, the lower end of the sealing bushing penetrates into the mounting base, the first sealing washer is sleeved on the sealing bushing and in interference fit with the outer wall of the sealing bushing, the porcelain bushing is arranged on the wiring terminal and above the sealing bushing, the porcelain bushing is screwed on the wiring terminal to push the porcelain bushing downwards along the axial direction of the wiring terminal, so that the porcelain bushing is tightly abutted against the sealing bushing, and the porcelain bushing compresses the first sealing washer on the mounting base to enable the first sealing washer to be embedded into a protection groove formed at the lower end of the porcelain bushing. The secondary porcelain bushing structure of the voltage transformer can ensure long-term stability of the sealing effect.

Inventors

  • YAO QUANLING
  • YAO ZHIZHOU
  • CHEN QIWEI

Assignees

  • 温州市凯泰特种电器有限公司

Dates

Publication Date
20260512
Application Date
20260415

Claims (8)

  1. 1. The secondary porcelain bushing structure of the voltage transformer comprises a wiring terminal (1), a first sealing washer (2), a porcelain bushing (3) and a first locking nut (4), the method is characterized in that: also comprises a mounting base (5) and a sealing sleeve (6), the installation base (5) is fixedly connected with the outer wall of the shell of the voltage transformer, the wiring terminal (1) is penetrated into the installation base (5) so that the upper end of the wiring terminal (1) penetrates out of the installation base (5), the sealing sleeve (6) made of flexible materials is sleeved on the wiring terminal (1) and the lower end of the sealing sleeve (6) penetrates into the installation base (5), the first sealing washer (2) is sleeved on the sealing sleeve (6) and is in interference fit with the outer wall of the sealing sleeve (6), the porcelain sleeve (3) is sleeved on the wiring terminal (1) and is positioned above the sealing sleeve (6), the first locking nut (4) is in threaded connection with the wiring terminal (1) and pushes the porcelain bushing (3) downwards along the axial direction of the wiring terminal (1) so that the porcelain bushing (3) is tightly abutted against the sealing sleeve (6), and the porcelain bushing (3) presses the first sealing gasket (2) on the mounting base (5) so that the first sealing gasket (2) is embedded into a protective groove (31) formed at the lower end of the porcelain bushing (3).
  2. 2. The secondary porcelain bushing structure of the voltage transformer according to claim 1, wherein an insulating base plate (7) is sleeved at the lower end of the wiring terminal (1), a second locking nut (8) positioned below the insulating base plate (7) is connected at the lower end of the wiring terminal (1) in a threaded mode, and the second locking nut (8) is matched with the first locking nut (4) to enable the insulating base plate (7) to be tightly abutted to the inner wall of the installation base (5).
  3. 3. The secondary porcelain bushing structure of the voltage transformer according to claim 2, wherein a first positioning hole (71) and a second positioning hole (32) matched with the sealing sleeve (6) are respectively formed in the insulating base plate (7) and the porcelain bushing (3), and the lower end and the upper end of the sealing sleeve (6) penetrate into the first positioning hole (71) and the second positioning hole (32) respectively.
  4. 4. The secondary porcelain bushing structure of a voltage transformer according to claim 2, wherein the insulating base plate (7) is in a fan shape, a limit groove (52) matched with the insulating base plate (7) is formed in the mounting base (5), and the insulating base plate (7) is kept in the limit groove (52).
  5. 5. The secondary porcelain bushing structure of a voltage transformer according to claim 1, wherein a convex ring (51) is formed at the upper end of the mounting base (5), and the first sealing gasket (2) is tightly abutted against the upper end of the convex ring (51).
  6. 6. The secondary porcelain bushing structure of the voltage transformer according to claim 5, wherein the porcelain bushing (3) is internally provided with a yielding groove (33) opposite to the convex ring (51), and the convex ring (51) extrudes the first sealing gasket (2) to enable the first sealing gasket (2) to be deformed and clamped into the yielding groove (33).
  7. 7. The secondary porcelain bushing structure of the voltage transformer according to claim 1, wherein the wiring terminal (1) is sleeved with a second sealing washer (9) and a cover plate (10) which are positioned between the porcelain bushing (3) and the first locking nut (4), and the cover plate (10) is acted by the first locking nut (4) to press the second sealing washer (9) on the porcelain bushing (3).
  8. 8. The secondary porcelain bushing structure of a voltage transformer according to claim 7, wherein the cover plate (10) is umbrella-shaped with a downward opening and is used for wrapping the second sealing gasket (9) inside.

Description

Secondary porcelain bushing structure of voltage transformer Technical Field The utility model relates to the technical field of voltage transformers, in particular to a secondary porcelain bushing structure of a voltage transformer. Background The voltage transformer comprises a shell, a primary winding and a secondary winding are arranged in the shell, the primary winding and the secondary winding are led out of the shell through a primary wiring terminal and a secondary wiring terminal which are arranged outside the shell, a primary porcelain sleeve and a secondary porcelain sleeve are arranged outside the primary wiring terminal and the secondary wiring terminal respectively for insulating protection, a sealing gasket is arranged between the secondary porcelain sleeve and the shell to seal the position of the shell, where the secondary wiring terminal penetrates out, of the shell, in the prior art, the sealing gasket is compressed by the secondary porcelain sleeve and then is positioned between the end part of the secondary porcelain sleeve and the shell, rainwater falling onto the shell is easy to invade between the sealing gasket and the shell to erode the sealing gasket, so that the sealing gasket is aged at an accelerated speed to cause sealing failure. Disclosure of utility model In view of the above, the present utility model is directed to a secondary porcelain bushing structure of a voltage transformer, so as to solve the above-mentioned problems. Based on the above object, the present utility model provides: The utility model provides a voltage transformer's secondary porcelain bushing structure, includes binding post, first sealing washer, porcelain bushing and first lock nut, still includes installation base and sealing sleeve, installation base fixed connection is in voltage transformer's casing outer wall, binding post wears to locate in the installation base and makes binding post upper end wear out the installation base, flexible material the seal cover pipe box is located on the binding post and the sealing sleeve lower extreme penetrates in the installation base, sealing washer cover locate sealing sleeve on with sealing sleeve outer wall interference fit, the porcelain bushing is located the binding post top that lies in sealing sleeve, first lock nut spiro union is followed binding post axial downwardly pushing porcelain bushing on binding post, makes the porcelain bushing tightly support on sealing sleeve, and makes the porcelain bushing compress tightly first sealing washer on the installation base and make first sealing washer embedding porcelain bushing lower extreme be formed with the protection groove. Preferably, the lower end of the wiring terminal is sleeved with an insulating base plate, the lower end of the wiring terminal is in threaded connection with a second lock nut positioned below the insulating base plate, and the second lock nut is matched with the first lock nut to enable the insulating base plate to be tightly abutted to the inner wall of the mounting base. Preferably, a first positioning hole and a second positioning hole matched with the sealing sleeve are respectively formed in the insulating base plate and the porcelain sleeve, and the lower end and the upper end of the sealing sleeve penetrate into the first positioning hole and the second positioning hole respectively. Preferably, the insulating base plate is fan-shaped, a limit groove matched with the insulating base plate is formed in the mounting base, and the insulating base plate is kept in the limit groove. Preferably, a convex ring is formed at the upper end of the mounting base, and the first sealing gasket abuts against the upper end of the convex ring. Preferably, a relief groove opposite to the convex ring is formed in the porcelain sleeve, and the convex ring extrudes the first sealing gasket to enable the first sealing gasket to deform and clamp into the relief groove. Preferably, the wiring terminal is sleeved with a second sealing gasket and a cover plate, the second sealing gasket and the cover plate are positioned between the porcelain sleeve and the first locking nut, and the cover plate is pressed on the porcelain sleeve under the action of the first locking nut. Preferably, the cover plate is umbrella-shaped with a downward opening, and the second sealing gasket is wrapped inside the cover plate. The utility model has the beneficial effects that: the outside seal that forms through first sealing washer is located between installation base and the insulator, make outside seal place position be higher than voltage transformer's casing, fall to the rainwater on the voltage transformer casing be difficult for getting into between installation base and the insulator and cause the erosion to first sealing washer, and first sealing washer receives the erosion that the guard action of protecting groove is difficult for receiving the sand blown by the wind, thereby the ageing speed of first seali